Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Absorber
Density, p
Attenuation coefficient Mu/p [cm^2/g]
Mu
Half value layer (HVL), [cm]
Copper
8.960
0.455
4.077
0.1700
Tin
7.298
1.667
12.17
0.05694
Lead
11.360
5.461
62.04
0.01117
a) Estimate the thickness of each absorber required to attenuate a 100 keV photon beam by a 99.99 %.
Which absorber material would be ideal for building a wall to shield you from the photons? Why?
b) If the energy of the photon beam is increased to 1000 keV, the attenuation coefficient for lead decreases to 0.0701 cm^2/g. What is the HVL for lead at 1000 keV? How does this half value layer (HVL) thickness compare to the HVL value at 100 keV? The reciprocal of the linear attenuation coefficient is the mean free path length (lamda), which is the average distance a photon travels in the absorber before it interacts in a collision. Obtain the mean free path length for lead at the two photon energies and comment on the values.
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, which are rotating neutron stars (highly compact stars consisting only of neutrons).
A 0.245 kg ball is thrown straight up from 1.94 m above the ground. Calculate the total work done by the force of gravity during that time
A 4.5kg box slides down a 4.6m -high frictionless hill, starting from rest, across a 2.4m -wide horizontal surface, What is the speed fo the box just before hitting the spring
A 10 kg box is on the flatbed of a truck that is accelerating along a straight horizontal road. What is the max acceleration the truck can reach without the box falling
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 5.00 V. What is the power drawn from the electric outlet, if the transformer is assumed to be ideal
A block of mass M hangs from a spring having spring constant k = 12 N/m and oscillates up and down with simple harmonic motion. What is the maximum speed of the block
An airplane, diving at an angle of 48º with the vertical, release a projective at an altitude of 830m. What was the vertical component of its velocity just before striking the ground
The earth has a vertical electric field with a magnitude of approximately 100 V/m near its surface. What is the magnitudeof the potential difference between a point on the ground and pointon the same level as the top of the Washington Monument (55..
Your task in physics laboratory is tomake a microscope from two lenses. One lens has a focal length of 2.4 cm, the other 1.2 cm. You plan touse the more powerful lens as the objective, and you want the eye piece to be 17 cm from the objective
A 160 kg horizontal beam is supported at each end. A 300 kg piano rests a quarter of the way from one end. What is the vertical force on each of the supports
A nichrome toaster wire, initially at room temperature, carries 2.72A immediately after it's turned on. What's the temperature of the nichrome then
The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 129 kg and radius R = 85.3 cm. How long does it take for the flywheel to come to rest
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd